20-24mm ball counting device

The 8mm ball counting device requires two M3 * 20 screws, two M3 hot melt nuts, and two 3-5mm diameter springs. You can easily check 100 balls at a time. Before use, pour the balls into a container, and each hole can hold 5 balls, for a total of 100 balls. Pulling the handle will discharge all the balls for easy re measurement next time.